Number System and Simplification MCQs 2026

Division and multiplication come before addition: 72 / 8 = 9 and 6 x 3 = 18, so total is 27.

Writing 3.6 as 3.60 gives 3.60 + 2.45 = 6.05.

0.75 = 75/100, which reduces to 3/4 after dividing by 25.

Multiplication is done before addition: 3 x 4 = 12, then 7 + 12 = 19.

48 / 6 = 8 and 5^2 = 25, so the total is 8 + 25 = 33.

The square roots are 12 and 9, and 12 + 9 = 21.

2^5 means 2 multiplied by itself five times, giving 32.

Using denominator 6, 1/2 = 3/6 and 1/3 = 2/6, so the sum is 5/6.

One-eighth of 64 is 8, so five-eighths is 5 x 8 = 40.

9^2 = 81 and 4^2 = 16, so 81 - 16 = 65.

1000 is divisible by 8, so the greatest lower three-digit multiple is 1000 - 8 = 992.

One-third of 45 is 15, so two-thirds is 30.

1.25 = 125/100, which reduces to 5/4.

14^2 means 14 x 14, which equals 196.

Divisibility by 5 requires last digit 0 or 5, and divisibility by 2 requires an even last digit; only 0 satisfies both.

45 = 3^2 x 5 and 60 = 2^2 x 3 x 5, so the HCF is 3 x 5 = 15.

The highest powers needed are 2^4 and 3, giving 16 x 3 = 48.

Writing 2.8 as 2.80 gives 6.75 - 2.80 = 3.95.

25 x 16 = 25 x 4 x 4 = 100 x 4 = 400.

Since 0.03 x 0.03 = 0.0009, the square root is 0.03.

Of means multiplication: 1/4 x 1/2 = 1/8.

5^3 = 125 and 2^3 = 8, so the sum is 133.

Each term is multiplied by 2, so the next term is 16 x 2 = 32.

The denominator is 10 x 5 = 50, and 1000 / 50 = 20.

The factors are 1, 2, 3, 6, 9, and 18, so there are 6.

Dividing 7 by 10 moves the decimal one place left, giving 0.7.

2 is prime but even; the smallest prime that is odd is 3.

6 x 5 = 30 and there are three decimal places in total, so the product is 0.030 = 0.03.

First 2 + 1 = 3, then 6 - 3 = 3, and finally 15 - 3 = 12.

In 5724, the digit 7 is in the hundreds place, so its place value is 700.

Adding 1 to 999 gives the next whole number, 1000.

Any non-zero number raised to the power 0 equals 1.

Adding the digits gives 9 + 8 + 7 + 6 + 5 = 35.

The predecessor is the number immediately before a given number, so 10000 - 1 = 9999.

Multiplying numerator and denominator by 10 gives 15 / 3 = 5.

9 = 3^2 and 15 = 3 x 5, so the LCM is 3^2 x 5 = 45.

31 is prime and is the next integer greater than 29 that has only two factors.

In Roman numerals, L denotes fifty.

To convert a decimal to a percentage, multiply by 100; 0.04 x 100 = 4%.

The divisibility test for 9 uses the sum of digits; if that sum is divisible by 9, the number is divisible by 9.

17 x 11 = 17 x (10 + 1) = 170 + 17 = 187.

The first five natural numbers sum to 15, and 15 divided by 5 is 3.

The reciprocal of a fraction is obtained by interchanging numerator and denominator.

The brackets give 8 and 5, and 8 x 5 = 40.

The cube of 6 is 6 x 6 x 6 = 216.