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What approximate value should come in place of the question mark (?) in the following questions?
5/7 of 3170 - 2/5 of 4311 = ?
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Thus the given expression is approximately equal to, 2265-1724 = 541
35% of 796 + 65% of 302 = ?
35% of 796 ≈ 35% of 800 = 280 65% of 302 ≈ 65% of 300 = 195 Thus the given expression is approximately equal to, 280+195 = 475
10 ∗ 15 ∗ 16 = 2400
The given expression is approximately equal to,
√2401 = 49
What is the value of the (?) in the following number series?
1,8,27,64,125,?
The list is 13,23,33,43,53, The next term is 63 = 216
1,3,9,27,81,243,?
The given series is in GP with first term 1 and common ratio = 3 Next term = 243*3 = 729
Directions For Questions
A school contains different classes - A, B, C, D, E, F. The percentage of girls in each class is as shown in the graph. The total number of students in each class is as shown in the table.
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Find the number of boys in class A?
Percentage of girls in A = 25% Percentage of boys in A = 75% Number of boys in A = 75% of 60 = 45
Find the sum of the difference between the number of boys and the number of girls in B and C?
Percentage of girls and boys in B = 35% and 65% Difference = 30% of 100 = 30 Percentage of girls and boys in C = 40% and 60% Difference = 20% of 75 = 15 Sum = 30+15 = 45
Find the total number of girls in school?
Total number of girls = 25% of 60 + 35% of 100 + 40% of 75 + 25% of 80 + 55% of 100 + 85% of 100 = 15+35+30+20+55+85 = 240
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