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Number System

Number System
In how many different ways can the letters of word "SENTENCE" be arranged ?

2360
3360
3260
6460

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Number of ways = 8!/3! 2! = 40320/12 = 3360

Number System
Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number

5
7.5
15
4

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5

Number System
[(18.6 x 4.5) + (7.8 ÷ 0.24)] ÷ 3.2 = ?

25.3125
26.3125
36.3125
46.3125

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 83.7 + 32.5/3.2 = 116.2/3.2 = 36.3125

Number System
63.602 + 153.756 + 94.754 - 84.321 - 122.204 = ?

142.587
143.587
141.587
140.587

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 312.112 - 170.525 = 141.587

Number System
If A + B = 30 and AB = 94, What is the value of A² + B² ?

712
920
824
625

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94                                = 900 - 188 = 712

Number System
(4 86%of 6500) ÷ 36 =?

777.5
877.5
677.5
977.5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

877.5

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