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In the following list of numerical, how many 2's are followed by l's but not preceded by 4? 421214211244412212144214121242124146
How many 3's are there in the following sequence which are neither preceded by 6 nor immediately followed by 9? 9366395937891639639
A man had an accident and was admitted into the hospital. When questioned by the police about the vehicle, he replied it is a Yamaha bike. It is red in color and the rider was wearing a black shirt. The police inspector said, that is all right, but tell me anything about the registration number. "For this the replied I do not remember the number but there is a peculiarity of the number. It has only two factors excluding 1 and itself. In addition, it is a four digit number with the first two digits forming a perfect square. Also, the next two digits form a number which is one more than a perfect square". Which of the following could be the number?
A 2 - digit number is such that the sum of its digits is 5 times the difference of the digits. If the number is neither a prime nor a perfect square, then how many such 2-digit numbers are possible?
If the unit's digit in the product of 6x7x8x9 has to be the same as that in that product of 2x3x4x5, which of the given digits should be increased by one?
What will be the last digit of the number obtained by multiplying 17^50 and 19^76?
The number of zeros at the end of the product 16x22x15x50x65x115x18x90 is_