How to be number one || सबसे आगे कैसे होगें ? Vikram Singh || Motivational

The Director of the institute XYZ has announced that six guest lecturers on different areas like Leadership, Decision Making, Quality centre, Motivation, Assessment centre and Group Discussions are to be organised only one on each day from Monday to Sunday. (i) Motivation should be organised immediately after Assessment centre. (ii) Quality centre should be organised on Wednesday and should not be followed by Group Discussion. (iii) Decision Making should be organised on Friday and there should be a gap of two days between Leadership and Group Discussion (iv) One day there will be no lecture(Saturday is not that day), just before that day Group Discussion will be organised. How many lecturers were orgainised between Motivation and Quality centre ?

Bhim Singh, Narendra singh and Monika start business in capital ratio 3 : 5 : 7. After one year, Monika invested Rs. 337600 more while Bhim singh withdraws Rs. 45600 and investment converted into 24 : 59 : 167 . How many Rs. Bhim singh invest in starting.

How many 3-digit number have exactly one of their digits as 5?

How many three digit numbers are there such that at leat one of their digits is 7?

How many even numbers are there with three digits such that if 5 is one of the digits,then 7is the next digit?

Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal ? If so why ? If not how ?