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Identify the smallest prime number that is greater than 47.
Correct answer(s):
- 53
Express the fraction 3/8 as a decimal.
Correct answer(s):
- 0.375
Find the greatest common divisor (GCD/HCF) of 84 and 126.
Correct answer(s):
- 42
Calculate the least common multiple (LCM) of 12 and 18.
Correct answer(s):
- 36
Find the value of the digit 7 in the number 57,834.
Correct answer(s):
- 7,000
In the number 374,809 find the place value of the digit 7.
Correct answer(s):
- 70,000
Select all numbers that are rational from the list.
Correct answer(s):
- 0.333...
- 5/7
Two numbers are in the ratio 3:4 and their sum is 42. Find the two numbers.
Correct answer(s):
- 18 and 24
Find the digit x (0–9) that makes the number 4×27 divisible by 9.
Correct answer(s):
- 5
Calculate the sum of the first 20 natural numbers.
Correct answer(s):
- 210
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