GATE Exam | Aptitude Questions | GATE Syllabus | GATE Result | Mock Test | GATE Preparation

0 votes

Four matrices M1, M2, M3 and M4 of dimensions pxq, qxr, rxs and sxt respectively can be multiplied is several ways with different number of total scalar multiplications. For example, when multiplied as ((M1 X M2) X (M3 X M4)), the total number of multiplications is pqr + rst + prt. When multiplied as (((M1 X M2) X M3) X M4), the total number of scalar multiplications is pqr + prs + pst. If p = 10, q = 100, r = 20, s = 5 and t = 80, then the number of scalar multiplications needed is

- All categories
- Computer Science & Information Technology 451
- Mathematics 80
- Aptitude Questions 114
- GATE 94
- Online Aptitude Test 6
- Gate Exam 22
- Gate Syllabus 6
- Gate Preparation 35
- Gate Coaching 14
- Online Registration 20
- Electronics and Communication (EC) 0
- Electrical Engineering (EE) 3
- Civil Engineering (CE) 0
- Mechanical Engineering (ME) 2
- Aerospace Engineering (AE) 0
- Agricultural Engineering (AG) 0
- Architecture and Planning (AR) 0
- Biotechnology (BT) 0
- Chemical Engineering (CH) 1
- Chemistry (CY) 0
- Ecology and Evolution (EY) 0
- Geology and Geophysics (GG) 0
- Instrumentation Engineering (IN) 0
- Mining Engineering (MN) 0
- Petroleum Engineering (PE) 0
- Physics (PH) 0
- Production and Industrial Engineering (PI) 1
- Textile Engineering and Fibre Science (TF) 0
- Engineering Sciences 0
- Life Sciences 1
- Mathematics (MA) 0