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The numbers divisible by 4 between 1 and 145 are 4, 8, 12, 16, .........144 ; which is an A. P.
Here, a = 4, d = 4, tn = 144 we have to find n.
Alternate Method
∴ The sum of numbers between 1 and 145 divisible by 4 is 2664.
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Sum=2664 13th term=52
Step-by-step explanation:
AP=4,8,12,16,20...........144
Sum=2664
13th term=a+12d=52
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