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
($2 √{392}$ - 21) + $(√8 - 7)^2$ = $(?)^2$
Answer: (e)
$?^2 = 2√{48 × 8} = – 21 + 8 + 49 - 14√8$
= $14√8 – 21 + 57 – 14√8 = 36 = 6^2$
∴? = 6
$(√{7921} - √{2070.25}) × 1/4$ = ?
Answer: (b)
? = $(√{7921} - √{2070.25}) × 1/4$
= $(89 - 45.5)/4 = {43.5}/4 ≈ {44}/4$ = 11
Value of $^3√{392}×^3√{448}$is
Answer: (d)
$^3$$√392×^3√448=^3√{2×2×2×7 ×7}×^3√{2×2×2×2×2×2×7}$
= $^3$$√{(2×2×2)×(2×2×2)×(2×2×2)×(7×7×7)}$
=2×2×2×7[∵ $^3√p×^3√q=^3√{pq}$]
=56
$?/√36 = √25/{(11 × 3 - 18)}$
Answer: (b)
$?/√36=√25/(11 × 3 - 18)⇒?/6=5/{33 - 18} = 5/15=1/3$
∴= $6/3$ = 2
ssc cgl tier 1 2023 IMPORTANT QUESTION AND ANSWERS
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