A four digit number is to be formed using the digits 1 to 7
All digits of the number are different and repetition is not
allowed.
1. How many such numbers can be formed ?
2. How many such numbers are divisible by 4 ?
Answer Posted / purvi
Ans-200
I see with 1..7 if last 2 digits are
12,16,24,32,36,52,56,64,72,76...then the no. is divisible by 4
means last 2 digits has possible 10 Combinations
So Answer=P(5,2)*10=20*10=200
its correct!!!!!!!!!!!!!
Is This Answer Correct ? | 16 Yes | 4 No |
Post New Answer View All Answers
In a class of 60 students, a student of weight 45 Kg leaves the class. The average weight of the class is then increased by 200 gms. What is the average weight of the remaining 59 students in the class?
what is focus liner in gc hs?
A speaks truth 70% of the times, B speaks truth 80% of the times.What is the probability that both are contradicting each other is ?
Find out the Simple Interest paid for a sum of $4000 at the rate of 8% per annum for 3 months.
I most like to work with? Most men act though?
Which countries have two official national anthem ?
Dear Sir/ Madam, Kindly send me the model question answers for RRB-Technician Signal(Physics/Maths) to saranya67veena@gmail.com
what is the largest prime number in 8 digit number?
quants,logical,verbal
Two chords of lengths L1 and L2 are drawn in a circle. Their lengths are inversely proportional to the straight distance joining the centre.Find the radius of circle.
USA + USSR = PEACE ; P + E + A + C + E = ?
Find the value of the 678 to the base 7.
A person was fined for exceeding the speed limit by 10 mph. Another person was also fined for exceeding same speed limit by twice the same. If the second person was travelling at a speed of 35 mph, find the speed
Ramesh working alone on a job takes 12 days more than what he would have taken if Suresh had worked along with him while Suresh working alone on the same job takes 27 days more than what he would have taken if Ramesh had worked along with him. Find the time that both of them would take together to do the job.
slur : speech :: smulge : ?