Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 417 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
3. 3.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) that one dog barked (d) dogs hate you
4. 4.🧩 Aarav is 6 years old. Meera is 4 years older than Aarav. How old is Meera? (a) not enough info (b) 4 (c) 11 (d) 10
5. 5.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) not enough info (b) 8 (c) 80 (d) 16
6. 6.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
7. 7.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
10. 10.🧩 Tara bought 6 pens and a lunch box for ₹280 in all. Each pen cost the same. What did one pen cost? (a) ₹280 (b) ₹46 (c) ₹274 (d) not enough info
11. 11.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
12. 12.🧩 Vihaan is 7 years old. Saanvi is 7 years older than Vihaan. How old is Saanvi? (a) 15 (b) 14 (c) 7 (d) not enough info
13. 13.🧩 Meera bought 5 mangoes and a cap for ₹90 in all. Each mango cost the same. What did one mango cost? (a) ₹90 (b) ₹18 (c) ₹85 (d) not enough info
14. 14.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a loud opinion (d) a guess
15. 15.🧩 Aarav bought 3 notebooks and a bag for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹80 (b) ₹26 (c) not enough info (d) ₹77
16. 16.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) to be sure of results (d) for fun only
17. 17.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
18. 18.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) not enough info (c) 4 PM (d) 3 PM
19. 19.🧩 Ananya bought 4 notebooks and a lunch box for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹250 (b) ₹246 (c) not enough info (d) ₹62
20. 20.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking one friend (d) asking your pet
21. 21.🧩 Rohan is 8 years old. Nisha is 2 years older than Rohan. How old is Nisha? (a) 11 (b) not enough info (c) 10 (d) 2
22. 22.🧩 Diya bought 6 balls for ₹270 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) ₹270 (c) ₹45 (d) not enough info
23. 23.🧩 Ishaan is 6 years old. Meera is older than Ishaan. How old is Meera? (a) 8 (b) 7 (c) not enough info (d) 11
24. 24.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
25. 25.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
26. 26.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) 7 PM (d) not enough info
27. 27.🧩 Meera is 8 years old. Arjun is 3 years older than Meera. How old is Arjun? (a) 12 (b) 11 (c) 3 (d) not enough info
28. 28.🧩 Vihaan is 11 years old. Arjun is 6 years older than Vihaan. How old is Arjun? (a) 17 (b) 6 (c) 18 (d) not enough info
29. 29.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 5 (b) not enough info (c) 50 (d) 10
30. 30.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
31. 31.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) not enough info (b) 40 (c) 8 (d) 4
32. 32.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
33. 33.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
34. 34.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
35. 35.🧩 Saanvi bought 3 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹20 (c) not enough info (d) ₹25
36. 36.🧩 Kabir bought 3 notebooks and a water bottle for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹80 (c) ₹237 (d) ₹240
37. 37.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
38. 38.🧩 A box has 3 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 24 (b) 9 (c) not enough info (d) 18
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
40. 40.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence

Free critical thinking lessons, practice and worksheets at talentjr.in/critical-thinking-for-kids