aROUND the world
POWERful numbers
ORDER in the court!
WORDS are powerful
100
Which of these problems have the same answer?
Choose all possible answers.
a, b, d
100
62 × 82 = 2304
Use this fact to find the positive square root of 2304.
48
100
Work out
4 × [(13 + 8) − (17 − 9)]
52
100
Write 180 as product of prime factors.
22 x 32 x 5 or 2x2x3x3x5
150
0.003 ÷ 0.12
0.3
150
Use prime factors to find the the HCF of 324 and 144.
22 x 32 or 2 x 2 x 3 x 3 or 36
150
Work out
-3
150
A ___________ of a number is a value that, when multiplied by itself, gives the number.
Example: 4 × 4 = 16, so a _________ of 16 is 4.
square root
200
What is 58.01347 rounded to three significant figures?
58.0
200
Find the LCM of 2100 and 1500.
10 500
200
Estimate.
−33 972 ÷ 0.61
-50 000
200
What do you call 600 in relation to 120 and 75 in complete words.
lowest common multiple
250
4.9 ÷ 0.01 × 0.01 × 0.1
0.49
250
Find the value of x.
x3 − 12 = −228
-6
250
Work out the answer to this problem, giving your answer to one decimal place.
(62.9 – 48.32) × (0.6 ÷ 4) = _______
2.2
250
Determine the number of significant figures in each number.
5, 1, 2, 3, 8, 5 (in order)
300
Work out an estimate of
2400
300
Write the answer to this calculation in index form so that the base is prime.
48 × 45 ÷ 46
214
300
Work out the answer to this problem.
784
300
Index, exponent, power