If n2= 12345678987654321, what is n?

• 12344321
• 1235789
• 111111111
• 11111111

What are the last two digits of 72008?

•  01
• 21
• 61
• 71

What is the value of (x) in the following equation?

x0.4/16=32/x2.6

•  8 
• 9
• 6 
• 7

 In a tournament here are n teams T1, T2……Tn with n>5. Each team consists of k players, k>3. The following pairs of team have one player in common T1 and T2 and T3….., Tn-1 and Tn and Tn2nd T1- No other pair of teams has any player in common. How many players are participating in the tournament, considering all the n team together?

•  K (n-1) 
•  N (k-20)
•  K (n-2)
• N (K-1)

A man has 9 friends: 4 boys and 5 girls, In how many ways can he invite them, if there have to be exactly 3 girls in the invitees?

•  320 
• 160
• 80
• 200