squareroots and cuberoots Model Questions & Answers, Practice Test for ssc cgl tier 1 2023
ssc cgl tier 1 2023 SYLLABUS WISE SUBJECTS MCQs
Number System
Ratio Proportion & Partnership
Averages
Percentages
Profit & Loss
Time & Work
Time & Distance
Simple Interest & Compound Interest
Mensuration: Area & Volumes
Algebraic Expressions
Linear Equations
Squareroots & Cuberoots
$√ {12 × 184 ÷ 23 + 26 - 73}$ = ?
Answer: (c)
$√{12 × 184/23 + 26 - 73}$ = ?
= $√{96+26-73} = ? = √{122-73} = √{49}$ = 7
$√{17 + √51 + √152 + √289}$ = ?
Answer: (a)
$√{17 + √51 + √152 + √289}$
= $√{17 + √51 + √{152 + 17} = √{17 + √51 + √169}$
= $√{17 + √51 + √13} = √{17 + 8} = √25$ = 5
The least square number exactly divisible by 4, 6, 10, 15 is
Answer: (d)
Least number which is divisible by 4, 6, 10, 15 is
LCM (4, 6, 10, 15)
LCM (4, 6, 10, 15) = 60
60 = 2 × 2 × 3 × 5
Here we find that 3 and 5 occurs alone.
So, if we multiply 60 by
3 × 5 = 15, we get a perfect square no.
∴ 60 × 3 × 15 = 900
900 is the least square no. which is divisible by 4, 6, 10, 15.
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