Surds and Indices on Arithmetic Aptitude related Questions and Answers

Question 1 : If 3(x - y) = 27 and 3(x + y) = 243, then x is equal to


1. 4
2. 3
3. 5
4. 6
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Question 3 : Given that 100.48 = x, 100.70 = y and xz = y2, then the value of z is close to:


1. 1.45
2. 1.88
3. 2.9
4. 3.7
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Question 4 : if 5a = 3125, then the value of 5(a - 3) is:


1. 25
2. 125
3. 625
4. 1625
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Question 5 : If 3(x - y) = 27 and 3(x + y) = 243, then x is equal to:


1. 0
2. 2
3. 4
4. 6
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Question 8 : (25)7.5 x (5)2.5 ÷ (125)1.5 = 5?


1. 8.5
2. 13
3. 16
4. 17.5
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Question 10 : If m and n are whole numbers such that mn = 121, the value of (m - 1)n + 1 is:


1. 1
2. 10
3. 121
4. 1000
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