Which standardized test begins by determining the mental age of the subject and then asks progressively more difficult questions until the subject can no longer answer?

Explanation:

Stanford-Binet test is used to measure the intelligence. It uses five factors of cognitive ability. The five factors are knowledge, fluid reasoning, visual-spatial processing , quantitative reasoning and working memory, both nonverbal and verbal responses of the person being tested are measured in this test.

All the five factors are given a weight and the score of test is combined and reduced to a ratio that is known as IQ.  It is the most standardised test currently in use. It has been revised many times. It is developed form of Bienet-Simon Scale.

if you are on the computer you can not take a picture but you can upload one but i am not sure about phones but i'm pretty sure it's the but to upload one just click the paper clip looking thing/ link thingy thing and upload a pic

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.