Question 24
Write the correct answer from the given four options.
Given that, √4096=64, the value of √4096+√40.96 is
a) 74 b) 60.4 c) 64.4 d) 70.4
Given, √4096=64 So, √4096+√40.96 =64+√4096×10−2=64+√4096√10−2=64+64×10−1=64+6.4=70.4
Question 11
The sum of successive odd numbers 1, 3, 5, 7, 9, 11, 13 and 15 is
a) 81 b) 64 c) 49 d) 36
Question 12
The sum of first n odd natural numbers is
a) 2n+1 b) n2 c) n2−1 d) n2+1
Question 22
If m is the cube root of n, then n is
a) m3 b) √m c) m3 d) 3√m
Question 23
The value of √248+√52+√144 is
a) 14 b) 12 c) 16 d) 13