JavaScript — Math

1 Check even or odd Easy 2 Factorial of a number Medium 3 Fibonacci series (first 10 terms) Medium 4 Sum 1..5 #1 Hard 5 Filter evens #2 Medium 6 Map squares #3 Easy 7 Max in set #4 Medium 8 Reduce product #5 Hard 9 Sum 1..10 #6 Medium 10 Filter evens #7 Easy 11 Map squares #8 Medium 12 Max in set #9 Hard 13 Reduce product #10 Medium 14 Sum 1..15 #11 Easy 15 Filter evens #12 Medium 16 Map squares #13 Hard 17 Max in set #14 Medium 18 Reduce product #15 Easy 19 Sum 1..5 #16 Medium 20 Filter evens #17 Hard 21 Map squares #18 Medium 22 Max in set #19 Easy 23 Reduce product #20 Medium 24 Sum 1..10 #21 Hard 25 Filter evens #22 Medium 26 Map squares #23 Easy 27 Max in set #24 Medium 28 Reduce product #25 Hard 29 Sum 1..15 #26 Medium 30 Filter evens #27 Easy 31 Map squares #28 Medium 32 Max in set #29 Hard 33 Reduce product #30 Medium 34 Sum 1..5 #31 Easy 35 Filter evens #32 Medium 36 Map squares #33 Hard 37 Max in set #34 Medium 38 Reduce product #35 Easy 39 Sum 1..10 #36 Medium 40 Filter evens #37 Hard 41 Map squares #38 Medium 42 Max in set #39 Easy 43 Reduce product #40 Medium 44 Sum 1..15 #41 Hard 45 Filter evens #42 Medium 46 Map squares #43 Easy 47 Max in set #44 Medium 48 Reduce product #45 Hard 49 Sum 1..5 #46 Medium 50 Filter evens #47 Easy