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Square and Cube Practice Set

1. 136√? + 2841 = 8961
A. 2116
B. 1936
C. 2025
D. 2209

Answer: Option C
Explanation: 136√? + 2841 = 8961
or 136√? = 8961 – 2841
or √? = 6120136 = 45
? = (45)2 = 2025

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2. √? + 415 of 980 = 4180
A. 4096
B. 4225
C. 3969
D. 3844

Answer: Option A
Explanation:√? + 215 of 980 = 4180
or √? + 4116 = 4180
or √? = 4180 – 4116
= 64
? = (64)2 = 4096

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3. 19√? + 291 = 340 × 25 + 364
A. 100
B. 121
C. 144
D. 81

Answer: Option B
Explanation:19√? + 291 = 340 × 25 + 364
or 19√? + 291 = 136 + 364
or 19√? = 500 – 291 = 209
√? = 29019 = 11
? = (11)2 = 121

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4. (√77284)2
A. 278
B. 268
C. 272
D. 262

Answer: Option A
Explanation:(√77284)2 = ?2
or ? = √77284
= 278

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5. √5776√289 = ?493
A. 2404
B. 2104
C. 2304
D. 2204

Answer: Option D
Explanation:√5779√289 = ?493
or 7617 = ?493
? = 493 × 7617
= 2204

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6. 48 + √49 + 25 – √25√144 – √81
A. 26
B. 25
C. 24
D. 23

Answer: Option B
Explanation:? = 48 + √49 + 25 – √25√144-√81
= 48 + 7 + 25 – 512 – 9
= 753 = 25

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