100-150

Option B. multiply by 2.54.

Option C. divide by 25.4.

Correct Answer is. multiply by 2.54.

Explanation. There are 2.54 cm in one inch.

Question Number. 101. 0.000006 volts can be written as.

Option A. 60 nanovolts.

Option B. 6 microvolts.

Option C. 6 millivolts.

Correct Answer is. 6 microvolts.

Explanation. Move decimal place 6 places to right to get it to 6.0. 6 decimal places is 'micro'.

Question Number. 102. The median of the values 20, 28, 17, 34, 40, 11, 34, 26 is.

Option A. 34.0.

Option B. 27.0.

Option C. 26.25.

Correct Answer is. 27.0.

Explanation. Median means 'in the middle'. Put them in order lowest to highest. Find the middle number, or middle two numbers. 26 and 28 in this case. The median is half way between these to numbers.

Question Number. 103. The mode of the following 28, 17, 34, 28, 34, 35, 28, 40 is.

Option A. 28.0.

Option B. 30.5.

Option C. 31.0.

Correct Answer is. 28.0.

Explanation. Mode means 'the one which occurs most often'. In this case = 28.

Question Number. 104. 0.004 amperes can be written as.

Option A. 0.4mA.

Option B. 4kA.

Option C. 4mA.

Correct Answer is. 4mA.

Explanation. Move the decimal places 3 places to make it 4.0 Three decimal places is 'milliAmps' (mA).

Question Number. 105. A sphere with a radius of 2 cm has a surface area of.

Option A. 16π cm² .

Option B. 64π cm² .

Option C. 8π cm² .

Correct Answer is. 16π cm² .

Explanation. Area of a sphere is 4 π r² 4*π*2*2 = 16π.

Question Number. 106. The sum of an odd and an even number is.

Option A. sometimes odd, sometimes even.

Option B. always odd.

Option C. always even.

Correct Answer is. always odd.

Explanation. Odd + odd = even. Even + even = even. Odd + even = odd.

Question Number. 107. A copper pipe has a radius of 7/32 inch. What is this in decimal?.

Option A. 0.28125.

Option B. 0.15625.

Option C. 0.21875.

Correct Answer is. 0.21875.

Explanation. Quickest way is to remember that 1/32 = 0.03125, and multiply it by 7.

Question Number. 108. Millibar is the unit of.

Option A. temperature.

Option B. pressure.

Option C. density.

Correct Answer is. pressure.

Explanation. Millibars is pressure.

Question Number. 109. A ball rolls down a hill initially at 60 ft/s. It slows down at a rate of 5 ft/s² for 7 seconds. What will its final speed be?.

Option A. 15 ft/s.

Option B. 35 ft/s.

Option C. 25 ft/s.

Correct Answer is. 25 ft/s.

Explanation. 5 ft/s2 for 7 seconds = 35 ft/s deceleration. 60-35 = 25 ft/s final velocity.

Question Number. 110. A dial gauge is calibrated to an accuracy of 0.001 inch, when using the dial gauge, you should.

Option A. round off the answer to calibrated value.

Option B. read the true value to 4 decimal places.

Option C. read five significant figures.

Correct Answer is. round off the answer to calibrated value.

Explanation. Round the reading to the accuracy it can read (3 decimals in this case).

Question Number. 111. In a flight control system, the control cable is allowed an elongation of 3% due to wear. The length from the manufacturer is 78cm, what is its maximum used length?.

Option A. 80.34 cm.

Option B. 78.34 cm.

Option C. 2.34 cm.

Correct Answer is. 80.34 cm.

Explanation. 3/100 * 78 = 2.34 78 + 2.34 = 80.34.

Question Number. 112. You have made 20% profit. Your balance is now £900. What was your pre-profit balance?.

Option A. £700.

Option B. £800.

Option C. £750.

Correct Answer is. £750.

Explanation. + 20/100 = 900, 100/100 + 20/100 = 900, 120/100 = 900, transpose for.

Question Number. 113. One of the square roots of a positive number is positive. What is the other one?.

Option A. positive or negative.

Option B. negative.

Option C. positive.

Correct Answer is. negative.

Explanation. Example - Square root of 4 is either 2 (since 2*2=+4), or -2 (since-2*-2=+4).

Question Number. 114. A cylinder has a radius of 20cm and a length of 40cm. What is its volume? (Take π as 3.1).

Option A. 49600cm³ .

Option B. 50270cm³ .

Option C. 800cm³ .

Correct Answer is. 49600cm³ .

Explanation. Base Area = π * r² = 3.1 * 20 * 20 = 49600.

Question Number. 115. Can you take the cube root of a negative number?.

Option A. No.

Option B. Yes.

Option C. Only certain numbers.

Correct Answer is. Yes.

Explanation. You can take the cube root, but not the square root.

Question Number. 116. The process of removing roots from the denominator of fractions is called what?.

Option A. Rationalizing the denominator.

Option B. Squaring the denominator.

Option C. Derooting the denominator.

Correct Answer is. Rationalizing the denominator.

Explanation. Nil http://www.wtamu.edu/academic/anns/mps/math/mathlab/int_algebra/int_alg_tut41_rationalize.htm.

Question Number. 117. Find the curved surface area of a cylinder diameter 20cm and length 10cm.

Option A. 1256 cm² .

Option B. 2512 cm² .

Option C. 400 cm² .

Correct Answer is. 1256 cm² .

Explanation. Area = π * d * h = 3.14 * 20 * 10 = 628. Multiply by 2 (because there is inside and outside) = 1256.

Question Number. 118. The conversion factor of litres to pints is.

Option A. 2.2.

Option B. 1.76.

Option C. 0.57.

Correct Answer is. 1.76.

Explanation. Nil http://www.thetipsbank.com/convert.htm.

Question Number. 119. The volume of a pyramid is ____ times b times h.

Option A. 1/4.

Option B. 1/3.

Option C. 1/2.

Correct Answer is. 1/3.

Explanation. Nil http://www.aaaknow.com/geo79_x6.htm.

Question Number. 120. What is the square root of 0.0289?.

Option A. 0.17.

Option B. 1.017.

Option C. 1.7.

Correct Answer is. 0.17.

Explanation. Only a number less than 1 can give an even smaller number when squared.

Question Number. 121. A car travelling at 72 km/hour is travelling at what speed?.

Option A. 30m/s.

Option B. 20m/s.

Option C. 10m/s.

Correct Answer is. 20m/s.

Explanation. 72 * 1000/3600 = 20.

Question Number. 122. If you bought a TV set worth £30 after getting 15% discount. How much discount did you get?.

Option A. £15.

Option B. £5.

Option C. £35.

Correct Answer is. £5.

Explanation. Approximate (10% of 30 + add half again) - Not strictly the correct method (as this finds 15% of final price, not the original price) but answers are far apart enough to permit.

Question Number. 123. If you bought a second hand car worth £4500 after getting 15% discount. How much did the car cost originally?.

Option A. £3800.

Option B. £5300.

Option C. £6000.

Correct Answer is. £5300.

Explanation. x-(x 15/100) = 4500 x-0.15x = 4500 0.85x = 4500 x = 4500/0.85 = 5300 (approx).

Question Number. 124. 31 * 91 * 23 * 52 =.

Option A. 3,373.

Option B. 33,739.

Option C. 3,373,916.

Correct Answer is. 3,373,916.

Explanation. Round off to 30, 90, 20 and 50, 3 * 9 * 2 * 5 = 270, 10 * 10 * 10 * 10 = 10,000, 270 * 10,000 = 2,700,000 Now choose the answer based on order of magnitude.

Question Number. 125. 1/5 + 2.5-6 =.

Option A. 3.3.

Option B. 2.0.

Option C. -3.3.

Correct Answer is. -3.3.

Explanation. 1/5 = 0.2 0.2+2.5 = 2.7, 2.7-6 = -3.3.

Question Number. 126. Express 173942 in standard form.

Option A. 17.3942 * 104.

Option B. 173.942 * 103.

Option C. 1.73942 * 105.

Correct Answer is. 1.73942 * 105.

Explanation. Standard form has the mantissa between 1 and 10.

Question Number. 127. The sum of an odd number + an odd number is a.

Option A. either odd or even.

Option B. odd number.

Option C. even number.

Correct Answer is. even number.

Explanation. NIL.

Question Number. 128. Express 750 milligrams in grams.

Option A. 0.0000075.

Option B. 0.075.

Option C. 0.75.

Correct Answer is. 0.75.

Explanation. 'milli' is divide by 1000.

Question Number. 129. There is 1800 pounds of fuel in an aircraft, 25% in the left tank and 45% in the right. How much fuel is in the centre tank?.

Option A. 810 pounds.

Option B. 450 pounds.

Option C. 540 pounds.

Correct Answer is. 540 pounds.

Explanation. 30% * 1800 = 540.

Question Number. 130. What is the supplement of an angle of 37°?.

Option A. 8°.

Option B. 53°.

Option C. 143°.

Correct Answer is. 143°.

Explanation. 180-37 = 143°.

Question Number. 131. To what power must 10 be raised to equal 100,000?.

Option A. 6.

Option B. 4.

Option C. 5.

Correct Answer is. 5.

Explanation. An easy way to tell the power of 10 to which a number has been raised is to count the number of places the decimal point would have to be moved to leave a number between 1 and 10. Remember the decimal point though not written will be after the unit, in this case the last 0.

Question Number. 132. Find the square root of 1600.

Option A. 80.

Option B. 40.

Option C. 800.

Correct Answer is. 40.

Explanation. 1600 = 16 * 100 √1600 = √16x√100 = 4x10 = 40.

Question Number. 133. What is the ratio of 5 feet to 30 inches?.

Option A. 2 : 1.

Option B. 5 : 3.

Option C. 1 : 6.

Correct Answer is. 2 : 1.

Explanation. In any ratio caculation the units must be the same. 5 feet is equal to 60 inches. Ratio of 60 : 30 or 60/30 is 2 : 1.

Question Number. 134. Evaluate 5[ 3 + 6(7-4)-2].

Option A. 31.

Option B. 395.

Option C. 95.

Correct Answer is. 95.

Explanation. First work out the inner brackets: 7-4=3, then multiply by 6: 6*3=18, Next the outer brackets : 3+18-2=19, Finally multiply by 5: 5*19=95.

Question Number. 135. Find the value of 3[ 5-2( 4-7)].

Option A. 9.

Option B. -3.

Option C. 33.

Correct Answer is. 33.

Explanation. First work out the inner brackets: 4-7=-3, then multiply by -2: -2x-3 = 6, Remember that -x-=+, Next the outer brackets: 5+6=11, finally multiply by the 3: 3*11=33.

Question Number. 136. What is the cube root of -64?.

Option A. 4.

Option B. -8.

Option C. -4.

Correct Answer is. -4.

Explanation. The cube root of a number is the number which when multiplied by itself 3 times gives the number. In this example -4x-4x-4=-64 hence the answer is -4.

Question Number. 137. What is the cube root of 8² .

Option A. 2.

Option B. 4.

Option C. 8.

Correct Answer is. 4.

Explanation. 8² = 64, cube root of 64 is 4 as 4x4x4=64.

Question Number. 138. An engine of 96 horsepower is running at 75% power. What horsepower is being developed?.

Option A. 72.

Option B. 168.

Option C. 62.

Correct Answer is. 72.

Explanation. 75% = 75/100 =3/4, 3/4x96=3x24=72.

Question Number. 139. A blueprint shows a hole of 0.3751 to be drilled. What fraction size drill bit is most nearly equal?.

Option A. 5/16.

Option B. 3/8.

Option C. 3/16.

Correct Answer is. 3/8.

Explanation. 3/16 = 0.1875, 5/16 = 0.3125, 3/8 = 0.375, 3/8 drill is the nearest.

Question Number. 140. 120 out of 125 bolts produced are of an acceptable tolerance. What percentage of the bolts are not acceptable?.

Option A. 5%.

Option B. 4%.

Option C. 25%.

Correct Answer is. 4%.

Explanation. Acceptable bolts 120/125 = 24/25, as a percentage this is 24/25 * 100 = 96%, Unacceptable bolts are 100%-96% = 4%.

Question Number. 141. Evaluate 1/4 + 3/8-1/2.

Option A. 1/8.

Option B. 1/14.

Option C. 1/2.

Correct Answer is. 1/8.

Explanation. Change all the fractions to a common denominator ¼ becomes 2/8, 3/8 remains same, ½ becomes 4/8. Now solve them by adding top Numerators SO answer is 1/8.

Question Number. 142. 3 3/4 + 4 2/3 =.

Option A. 8 5/12.

Option B. 7 5/12.

Option C. 7 5/7.

Correct Answer is. 8 5/12.

Explanation. add the whole numbers: 3+4 = 7, add the fraction 3/4 + 2/3 = 9/12 + 8/12 = 17/12 = 1 5/12, add on the 7: 8 5/12.

Question Number. 143. An aircraft travels 1400 nautical miles in 1 hour 45 minutes. What is the average speed of the aircraft?.

Option A. 750 knots.

Option B. 2450 knots.

Option C. 800 knots.

Correct Answer is. 800 knots.

Explanation. Average speed is found by dividing total distance by total time. 1400 / 1 3/4. This is done by dividing 1400 by 7/4 = 1400 * 4/7 = 200 * 4 = 800.

Question Number. 144. Evaluate 0.8 * 0.004.

Option A. 0.32.

Option B. 0.0032.

Option C. 0.032.

Correct Answer is. 0.0032.

Explanation. Count the digits to the right of the decimal points in both numbers (4), multiply the numbers without the points 8x4 = 32, put the decimal point so there are the same number (4) as in the question adding 0's as appropriate (0.0032).

Question Number. 145. Convert 10 inches to millimetres.

Option A. 2540 mm.

Option B. 254 mm.

Option C. 25.4 mm.

Correct Answer is. 254 mm.

Explanation. 1 inch = 2.54 cm =25.4 mm, 10 inches = 10 x 25.4 =254 mm.

Question Number. 146. What number is the highest common factor of 24, 84, 120?.

Option A. 8.

Option B. 12.

Option C. 24.

Correct Answer is. 12.

Explanation. 24=2*2*2*3, 84=2*2*3*7 HCF will be 2*2*3=12, 120=2*2*2*3*5.

Question Number. 147. 0.0000314 can be written as.

Option A. 3.14 x 10-5.

Option B. 3.14 x 105.

Option C. 3.14 x 10-4.

Correct Answer is. 3.14 x 10-5.

Explanation. The negative power indicates a reciprocal. 10-5 = 1/10,000, The easy way to do this problem is to count the number of places you need to move the decimal point to leave you with a number between 1 and 10. In this case it is 5.

Question Number. 148. What is the Lowest Common Multiple of 5; 12; 20.

Option A. 60.

Option B. 120.

Option C. 5.

Correct Answer is. 60.

Explanation. The lowest common multiple is the lowest number each number will divide into exactly. In this case the required number is 60.

Question Number. 149. Evaluate 1/4{(4-6)-(2-8)}.

Option A. 3/4.

Option B. -2.

Option C. 1.

Correct Answer is. 1.

Explanation. First work out the the two inner brackets: (4-6)=-2 and (2-8)=-6, then -(-6) = +6 followed by -2 +6 = 4 and finally 1/4 x 4 = 1.

Question Number. 150. What is the average of the following numbers? 5, 13, 23, 12, 17.

Option A. 14.

Option B. 15.

Option C. 23.

Correct Answer is. 14.