Number System Model Questions & Answers, Practice Test for ssc cgl tier 1 2024
ssc cgl tier 1 2024 SYLLABUS WISE SUBJECTS MCQs
Number System
Ratio & Proportion
Percentage
Time & Work
Time & Distance
Trigonometric Ratios & Identities
Average
Profit & Loss
Alligation & Mixtures
Simple Interest
Twice the square of a number is six times the other number. What is the ratio of the first number to the second ?
Answer: (d)
Suppose first and second number is x and y.
$2x^2 = 6y$ ⇒ $x^2 = 3y$
Ratio cannot be determined.
If n is a natural number, then $√n$ is
Answer: (d)
If n is a natural number, then $√n$ is either a natural number or an irrational number.
e.g., when n = 3 ⇒ $√3$ = Irrational number
When n = 9 ⇒ $√9$ = 3 = Rational number
Let x denote the greatest 4-digit number which when divided by 6, 7, 8, 9 and 10 leaves a remainder of 4, 5, 6 7 and 8 respectively. Then, the sum of the four-digits of x is and 8 respectively. Then, the sum of the four-digits of x is
Answer: (c)
The number will be a multiple of 6, 7, 8, 9, 10
LCM of 6, 7, 8, 9, 10 = 2520
∴ Largest 4-digit number divided by this = 7560
∴ Required number = 7558
Sum of the digits of this number = 25
The product of two consecutive odd numbers is 1763. What is the larger number?
Answer: (c)
From the given alternatives,
1763 = 43 × 41
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