eLitmus Masterclass

Solve an eLitmus masterclass multi-pipe fill and empty problem with initial half-filled tank, leaks, and all pipes open; deduce the tank fills in 24 hours.

Solve a three-person work-rate problem where Santosh and Sumit start, Salim joins later, and the six-day completion leads to Salim receiving 1500 rupees from the 5000 total.

An efficiency problem compares work rates of A, B, C, and D, concluding that D takes 18 days and C 9 days since C is twice as efficient as D.

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solve a work-rate puzzle where x men start and one leaves daily, compared to all working together for 60 percent; show x equals 5 and one man takes 15 days.

Explore b.c. formulas and classic algebraic identities, including the sum of squares and the sum of cubes from 1 to n, to tackle not-so-basic problems.

Explore solving a basic two-variable problem with one equation by expanding brackets, simplifying to a squared residual, and identifying zero residual conditions to determine the values.

Explore higher powers by solving a series of equations in x, including terms like 1/x and x^2. Practice algebraic cancellation and substitution to find x.

using a problem based on basic formulas, the lecture expands (a+b+c)^2 and shows that a = b = c, yielding the ratio a:b:c = 1:1:1.

This lecture defines data sufficiency problems, showing how each statement alone or together can suffice to answer a question, using option-based reasoning and a worked example.

solve data sufficiency problems to decide if a number is a perfect cube or a perfect square. analyze statements about a, b, c with abc=1800 and determine sufficiency.

Apply 55% of women and 40% of people being black to determine a party ratio. Derive the men-to-women ratio from 25% of men being black; statement 2 is not sufficient.

Apply the golden rules to solve crypto arithmetic problems using even and odd number rules and carries. Explore sums of two or three numbers and the resulting carries.

Apply the golden rule to patterns with a green line, identifying two possibilities: Gary 0 and d 0, or Gary 1 and d 9, across columns.

This lecture analyzes relationships among A, B, and C, showing when B exceeds or falls below C next column outcomes zero or one arise with B 6 and 16 placebo.

Explore the golden rules of logical reasoning through conditional comparisons among ABC and Kerry, showing how outcomes change with Kerry, B, and C under less-than and greater-than rules.

Tackle a crypto-themed alphametic addition problem, assigning digits to letters and solving carry constraints. Derive values for m, e, g, s, n and explore minimum and maximum possibilities.

Solve a cryptarithm style addition puzzle by analyzing column sums. Deduce digit values for letters such as e, n, s, m, and b through a table.

Apply the divisibility by eleven rule by subtracting the sums of digits in odd and even places, then use case analysis to deduce missing digits in a 6050 example.

Tackle a crypto automatic multiplication problem by mapping alphabets to digits, analyzing unit digits, applying golden rules, and using columnar deduction to resolve the puzzle.