Others Maths Puzzle

out of 1,2,3,4,5,6,7,8,9,10 seven numbers are selected in how many number of ways highest number can be 7

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Others Other Question

79,64,26,15,...?
options
a) 9
b) 4
c) 10
d) 6
m nt sure abt the 5th option bt it had 5th option also
i am just coming aftr giving the xam...n m socked that y couldn't i solv it...so i thought to take ur help.. If I Start Counting with the number 10,11,12,13...... in the left hand from little finger to thumb and counting the next number from forefinger to little finger and then back from little finger,ring finger,middle finger,fore finger to thumb and so on....which finger will i count the number 1099?