A businessman's earning increase by 25%in one year but decreases by 4%in the next. Going by this pattern, after 5 years, his total earnings would be Rs.72000. What is his present earning?
using the chaining method we can write 25% =1/4 , 4% = 1/25 1st years increase 4-----> 5 2nd year decrease 25 ----> 24 3rd year increase 4--------> 5 4th year decrease 25 ----> 24 5th years increase 4-----> 5 initial --->final ratio is 5--------> 9 after 5 years earning is 9 --->72000 present earning = 5 × 8000 = Rs 40000
-3 -10 -40 -185 -905 -4500
-4 a b c d e
Find the value of d.
...19, 37, 65, 91, 127, 169
? + (55)2= (140)2– (80)2– 6278
There are 3 series, you have to find value of a, b, c and then establish relation among a,b,c.
19, 25, 45, a, 553, 2767
1560 760 360 160 6...
What will be the next number in the series?
2,5,11,23,47,?
7 26 238 962 8522 ...
41 28 ? 15 67 2
4 5 12 39 160 ?
...130 155 146 195 186 ?
...108 329 ? 2975 8928 26789
