Practice GIKI Quantitative Reasoning questions with answers and explanations.
Choose an option to check your answer.
A number is divisible by 9 when the sum of its digits is divisible by 9.
For 5,832, the digit sum is 18.
Choose an option to check your answer.
The least common multiple of 3 and 4 is 12.
A number divisible by both must therefore be divisible by 12.
Choose an option to check your answer.
Since 12 × 13 = 156, subtracting gives 157 - 156 = 1.
Thus, the remainder is 1.
Choose an option to check your answer.
Division and multiplication have equal priority and are performed left to right.
So 48 ÷ 6 = 8, and 8 × 3 = 24.
Choose an option to check your answer.
Multiplication is performed before addition.
Thus, 3 × 4 = 12 and 5 + 12 = 17.
Choose an option to check your answer.
The operation inside parentheses is completed first.
Then 12 ÷ 3 = 4.
Choose an option to check your answer.
The multiplicative inverse of a nonzero fraction is its reciprocal.
Interchanging numerator and denominator gives 7/5.
Choose an option to check your answer.
A composite number has more than two positive factors.
The number 4 has factors 1, 2, and 4.
Choose an option to check your answer.
The positive factors of 16 are 1, 2, 4, 8, and 16.
Therefore, it has 5 positive factors.
Choose an option to check your answer.
Dividing 84 by primes gives 84 = 2 × 2 × 3 × 7.
This is 2² × 3 × 7.
Choose an option to check your answer.
An irrational number cannot be expressed as a ratio of integers.
The number √2 has a nonterminating, nonrepeating decimal expansion.
Choose an option to check your answer.
The expression 2⁵ means multiplying five factors of 2.
Thus, 2 × 2 × 2 × 2 × 2 = 32.
