MBA Exam

From the first ‘n’ consecutive natural numbers written on a blackboard, one of the numbers is
removed. If the average of the remaining numbers is then find the number removed.pls reply with shortcuts... thanks

1) 50
2) 64
3) 26
4) 46

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MBA Other Question
Raj Travels has the following revenue model for a group
package. Owner charges Rs. 20,000 per person till group size of 200.
For every additional traveller beyond 200, he starts offering discount
of 50 rupees to all members of the group. The maximum possible
income for Raj Travels from the package is:

1) Rs. 4000000
2) Rs. 4200000
3) Rs. 4500000
4) Rs. 5000000
5) Rs. 5500000
 what will be the remainder when.--124^124/125

1) 4
2) 3
3) 2
4) 1