The first block and the middle of the second test how you calculate, apply rules and hold information under time pressure. Mental arithmetic is the hardest of them, because you hear the problem and never see it.
Mental arithmetic
A synthetic voice reads each calculation once, in English, and nothing appears on screen. You have 20 seconds to type the answer, and no time to write anything down. The 20 items climb from easy to very hard: short chains of additions and subtractions, powers of two, squares such as 15 × 15, a percentage of a four-digit number, divisions such as 393 ÷ 3, and two-digit multiplications such as 35 × 89. The last items can be out of reach in 20 seconds, so secure the early ones rather than chase them.
Train by ear. The hard part is holding the numbers you heard, not the arithmetic itself.
Know your squares to 20, the powers of two and the common percentages as facts, not calculations.
Keep a running total for chains: 18 + 7 − 5 + 10 is 18, 25, 20, 30.
Concentration
Each item shows a two-digit number and a rule for building your answer from its digits, for example their sum followed by their difference. The answer is always two digits. At 150 items in 9 minutes, the module rewards a steady rhythm over checking every answer twice.
Analytical thinking
You get a code and five words, and decide which of the words match the code: 20 items in 10 minutes. It is logic rather than vocabulary. Nothing here reproduces it exactly, so practise applying unfamiliar rules quickly and accurately.
Acoustic memory
A voice reads a string of digits and you type them back in the order you heard them: ten strings of seven digits, then five of eight, then five of nine. Group each string into threes as you hear it, the way you hold a phone number.
The two clock modules
Spatial orientation: each clock face shows one numeral and no others. Read the time from the hands with only that numeral to anchor you. 50 clocks in 10 minutes is 12 seconds each.
Visual perception: six instruments appear with a rule such as 'white instrument with a circle'. Find every instrument that matches, up to five, and read the value each one points to. 30 items.
How to prepare
Audio Math Test and Acoustic Memory Test each have a TestAir360 mode built to this sitting: 20 spoken calculations at 20 seconds each, typed and climbing from easy to very hard, and the fixed schedule of seven, eight and nine digits typed back straight away. ENAC Dials Reading trains fast, accurate reading of analogue instruments, a clock among them, which is the skill behind both clock modules. Rule Application builds the habit of applying a rule set quickly against a clock, the core of the concentration module.