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The 10th common term between the A.P....

The 10th common term between the A.P.s 3,7,11,15, and 1,6,11,16,.. is `191` b. `193` c. `211` d. none of these

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The correct Answer is:
191
The first common term =11
Common differnece of new AP = LCM (4,5) =20
So, the new AP is 11,31,51,…..,
Its 10th term= ` (11 +9 xx20) =191`
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