Question
The difference between total SI earned on Rs 'P' at 18%
p.a. for 3 years and total CI earned on same sum at 20% p.a. for 2 years when compounded annually is Rs 640. Find P? (in Rs.)Solution
SI = (P × 18 × 3)/100 = 54P/100 CI = P{(1 + 20/100)2 – 1} = 44P/100 ATQ, 54P/100 – 44P/100 = 640 10P/100 = 640 P = Rs. 6400 Alternate Method: Total interest when calculated as SI = 18% × 3 = 54% Total interest when calculated as CI = 20 + 20 + (20 × 20)/100 = 44% ATQ: 54% - 44% = 640 1% = 64 100% = 6400 Therefore, P = Rs. 6400
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...Find the wrong number in given number series.
1500, 1450, 1390, 1350, 1240, 1150
4, 8, 24, 96, 485, 2880, 20160
56, 69, 90, 119, 156, 208
630, 180, 60, 24, 12, 8, 5
- Find the wrong number in the given number series.
25, 36, 29, 40, 33, 50 7, 16, 33, 74, 153, 312
Find the wrong number in the given number series.
3, 8, 15, 24, 35, 50, 63
- Find the wrong number in the given number series.
50, 64, 90, 134, 190, 260
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