Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 680 · 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.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) no mango is sweet (d) yes, it is certain
2. 2.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
3. 3.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 50 (b) not enough info (c) 5 (d) 10
4. 4.🧩 Nisha is 6 years old. Kabir is older than Nisha. How old is Kabir? (a) 8 (b) 11 (c) not enough info (d) 7
5. 5.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
6. 6.🧩 Arjun is 9 years old. Kabir is older than Arjun. How old is Kabir? (a) 10 (b) 14 (c) not enough info (d) 11
7. 7.🧩 Saanvi is 6 years old. Meera is older than Saanvi. How old is Meera? (a) 8 (b) not enough info (c) 7 (d) 11
8. 8.🧩 A box has 8 rows of apples, with 4 in each row. How many apples are in the box? (a) 36 (b) 32 (c) 12 (d) not enough info
9. 9.🧩 Nisha bought 3 notebooks and a water bottle for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹117 (c) ₹120 (d) not enough info
10. 10.🧩 Meera bought 6 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹20 (c) not enough info (d) ₹90
11. 11.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
12. 12.🧩 A box has 4 rows of apples, with 6 in each row. How many apples are in the box? (a) not enough info (b) 10 (c) 30 (d) 24
13. 13.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
16. 16.🧩 Aarav is 7 years old. Kabir is 6 years older than Aarav. How old is Kabir? (a) 6 (b) 13 (c) not enough info (d) 14
17. 17.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
19. 19.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
20. 20.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
21. 21.🧩 Vihaan is 11 years old. Ananya is older than Vihaan. How old is Ananya? (a) 16 (b) 13 (c) not enough info (d) 12
22. 22.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
24. 24.🧩 Kabir is 12 years old. Diya is older than Kabir. How old is Diya? (a) 17 (b) not enough info (c) 14 (d) 13
25. 25.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 8 PM
26. 26.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 9 PM (d) not enough info
27. 27.🧩 A box has 6 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) not enough info (b) 63 (c) 54 (d) 15
28. 28.🧩 Ananya is 9 years old. Kabir is older than Ananya. How old is Kabir? (a) 11 (b) 10 (c) 14 (d) not enough info
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
30. 30.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
31. 31.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
32. 32.🧩 Ananya bought 2 pens for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹80 (c) not enough info (d) ₹40
33. 33.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
34. 34.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
35. 35.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 18 (b) 9 (c) not enough info (d) 90
36. 36.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
37. 37.🧩 Nisha bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹15 (c) ₹20 (d) ₹30
38. 38.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
39. 39.🧩 Rohan bought 5 markers for ₹250 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) not enough info (c) ₹55 (d) ₹250
40. 40.🧩 Kabir is 9 years old. Aarav is 2 years older than Kabir. How old is Aarav? (a) 11 (b) 2 (c) 12 (d) not enough info

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