जब एक संख्या को 15 से विभाजित किया जाता है तो शेषफल सात बचता है और जब इसे 21 से विभाजित किया जाता है तो शेषफल 10 है पता करें कि 60और 6000 के बीच ऐसी कितनी संख्याएं हैं solution please
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60और 6000 के बीच ऐसी 56 संख्याएं हैं 15 से विभाजित तो शेषफल 7 & 21 से विभाजित किया जाता है तो शेषफल 10
Step-by-step explanation:
15a + 7 = 21b + 10
60 < 15a + 7 < 6000
=> 53 < 15a < 5793
=> 3 < a < 400
60 < 21b + 10 < 6000
=> 2 < b < 286
=> 15a = 21b + 3
=> 5a = 7b + 1
b = 7 a = 10 157
b = 12 a = 17 262
b = 17 a = 24 367
b = 282 a = 395 5932
157 , 262 , ........................................... 5932
a = 157
d = 105
5932 = 157 + (n-1)(105
=> n - 1 = 55
=> n = 56
60और 6000 के बीच ऐसी 56 संख्याएं हैं
or we could find LCM of 15 & 21 = 105 to find difference between numbers
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