In the proportion 8 : x = 12 : 18, determine the value of x.
Correct answer(s):
- 12
Subject
Mathematics
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Quizzes in Mathematics for Grade 8
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
Calculate 15% of 240.
Correct answer(s):
- 36
Which of the following is the decimal equivalent of 3/8
Correct answer(s):
- 0.375
Find the greatest common divisor (GCD) of 84 and 126.
Correct answer(s):
- 42
Calculate the least common multiple (LCM) of 18 and 24.
Correct answer(s):
- 72
Find the place value of the digit 5 in the number 3,456,789.
Correct answer(s):
- 50,000
Round the number 3.786 to two decimal places.
Correct answer(s):
- 3.79
What is the smallest positive integer that is divisible by both 6 and 15?
Correct answer(s):
- 30
Which of the following are rational numbers: 0.333…, √2, 5/7, π Select all that apply.
Correct answer(s):
- 0.333...
- 5/7