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Select all prime numbers from the list below.
Correct answer(s):
- 29
- 97
Write the fraction 7/8 as a percentage.
Correct answer(s):
- 87.5%
Express 0.375 as a simplified fraction.
Correct answer(s):
- 3/8
Find the greatest common divisor (GCD) of 84 and 126.
Correct answer(s):
- 42
Find the least common multiple (LCM) of the numbers 12, 30, and 45.
Correct answer(s):
- 180
If a and b are odd integers, which of the following expressions must be even? Choose all that apply.
Correct answer(s):
- a + b
- a^2 + b^2
Which number is greater: 0.405 or 0.450
Correct answer(s):
- 0.450
Select all rational numbers from the list: sqrt(2), 3/7, 0.142857…, π, -5.
Correct answer(s):
- 3/7
- 0.142857...
- -5
In the proportion 8 : x = 12 : 18, determine the value of x.
Correct answer(s):
- 12
Calculate the sum of all integers from 15 to 25 inclusive.
Correct answer(s):
- 220
Find the place value of the digit 7 in the number 4,705,321.
Correct answer(s):
- 700,000
If n = 2^3 × 3^2 × 5, compute the value of n.
Correct answer(s):
- 360
Express the repeating decimal 0.363636… (0.¯36) as a fraction in simplest form.
Correct answer(s):
- 4/11
Calculate the greatest common divisor (HCF/GCD) of 84 and 126.
Correct answer(s):
- 42
Find the least common multiple (LCM) of 18 and 24.
Correct answer(s):
- 72
Convert the mixed number 3 2/5 into its decimal form.
Correct answer(s):
- 3.4
Select all perfect squares from the list: 16, 18, 25, 30.
Correct answer(s):
- 16
- 25
Evaluate the expression: (-7) + 12 – (-5).
Correct answer(s):
- 10
Which of the following numbers is a prime number
Correct answer(s):
- 97
If two parts are in the ratio 3:4 and their total is 56, find the larger part.
Correct answer(s):
- 32